The X9460 is a low noise, low cost, high-end feature dual audio digitally controlled potentiometer. It integrates two digitally controlled potentiometers that can be used as stereo gain controls in audio applications. The position of the wiper on the array is controlled by the user through the 2-wire serial bus interface. The X9460 implements the digitally controlled potentiometer using 31 polysilicon resistors in a log array and connects tap points between each resistor to the wiper terminal through switches. It is designed to minimize wiper noise to avoid pops and clicks during audio volume transitions.
The X9460 integrates two digitally controlled log‑potentiometers on a CMOS IC for stereo audio gain control. It features zero‑amplitude wiper switching, a 2‑wire serial interface, and power‑up mute behavior.
The document includes functional block diagrams, detailed pin descriptions, command set tables, performance graphs, and packaging information, helping designers implement the device in audio equipment such as set‑top boxes, DVD players, and portable audio products.
| Total Resistance (typical) | 33 kΩ each XDCP |
|---|---|
| Dual Voltage Operation | V+ / V‑ = 2.7 V to 5.5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 14‑Lead TSSOP |
| Number of Taps per Pot | 32 taps (log array) |
| Zero‑Amplitude Wiper Switching | Enabled |
| Mute Level | -92 dB |
| Crosstalk Rejection | -102 dB @ 1 kHz |
| Channel‑to‑Channel Variation | +0.1 dB |
| Step Size (‑1 dB) | 11 steps |
The wiper is reset to the mute position when power is applied.
The X9460 is available in a 14‑lead TSSOP package.